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https://raw.githubusercontent.com/everknwon/netty-monitor/master/src/main/java/io/netty/monitor/utils/SystemInfoUtils.java
/*
 * MIT License
 *
 * Copyright (c) 2020 1619kHz
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
package io.netty.monitor.utils;

import java.lang.management.ManagementFactory;
import java.net.InetAddress;
import java.net.UnknownHostException;

public final class SystemInfoUtils {

  private SystemInfoUtils() {
  }

  public static String getPid() {
    return ManagementFactory.getRuntimeMXBean().getName().split("@")[0];
  }

  public static long getJvmStartUpTime() {
    return ManagementFactory.getRuntimeMXBean().getStartTime();
  }

  public static String getHostName() throws UnknownHostException {
    return InetAddress.getLocalHost().getHostName();
  }

  public static Integer getAvailableProcessors() {
    return Runtime.getRuntime().availableProcessors();
  }
}
